Supporting students with complex communication needs requires collaboration within and beyond the school system. Through a state-wide survey, this quantitative descriptive study used social network analysis to examine the professional networks and collaboration patterns of 325 special education teachers and 189 speech-language pathologists who worked with students with complex communication needs. Findings revealed wide variability in network size and function across these educators. Information is reported about collaborative partners, frequency of communication, perceptions of trust, and exchange of supports across relationships (i.e., informational, tangible, emotional supports). Teachers and speech-language pathologists who worked with students with access to high-tech augmentative and alternative communication (AAC) had larger professional networks than those whose students only used unaided AAC (e.g., gestures, signs) or low-tech AAC such as picture symbols. This research provides an important first look at AAC-related professional networks and collaboration patterns within these networks to inform future research and practice.